What's the Name of That Book??? discussion

This topic is about
Mini- Mysteries
SOLVED: Children's/YA
>
SOLVED. Middle Grade Mystery. Collection of short Detective stories about adult amateur detective (Sara(h)? librarian??). Read by mid 1980s. Spoiler [s]
date
newest »

You're welcome. About how many mysteries in this book? Did they all take place in the woman's hometown?


SPOILERS AHEAD FOR TWO CASES
Cases I remember:
1. She is checking into a hotel and sees someone else about to check in and realizes he may be an assassin. (There is a presidential motorcade coming through town.) She has the clerk room the guy on the side of the hotel next to the fountain so he'll think it's raining and the motorcade will be closed car. (There is a closing comment that she knew because she remembered JFK, I think.)
2. I don't remember the crime at all, but she catches one villain because she insists on learning whether to call the detective Miss or Mrs. (rather than just using Ms.) when the villain is supposed to be impersonating a feminist (they may be at a women's rights convention?) I think?
I've tried searching every way I can think of, and I just don't remember enough details to find the book. Please help. I'll update if I remember something else.